JP3420760B2 - String striking mechanism - Google Patents

Abstract

PCT No. PCT/DK90/00295 Sec. 371 Date May 15, 1992 Sec. 102(e) Date May 15, 1992 PCT Filed Nov. 16, 1990 PCT Pub. No. WO91/07740 PCT Pub. Date May 30, 1991.In a striking mechanism (1) for a piano, grand piano, or similar string instrument the power for the key (8a) is transferred to the hammer (3) via a rod system (10, 11, and 12) so adapted that the connection of the key (8a) and the hammer (3) is never interrupted. The rod system (10, 11, and 12) is supported during the striking movement against deflection by a first guide boss or roller (18) supported by a first curve guide (19), and during the return movement by a second guide boss or roller (20) supported by a second curve guide (21). The first curve guide (19) can swing between a first, advanced position in which it is releasably locked by a locking pawl (28) and the rod system is capable of causing the hammer (3) to touch the string when the key (8a) is pressed down, and a released second retracted position in which this is no longer possible. This ensures that the hammer (3) is withdrawn so rapidly after having struck the string (2) that the string can vibrate freely and deliver its note. The structure entails that the playing properties of the string instrument can be utilized better than known before.

Description

Description: TECHNICAL FIELD The present invention is a string striking device for a piano, a grand piano or a similar stringed instrument, and a hammer butt having a hammer shank having a hammer at its free end is provided for each string or a set of strings. On the other hand, it is pivotally supported about the horizontal axis,
A force transmitting device that acts between the hammer butt and the rear end of the associated key in the keyboard of the musical instrument to force the hammer to strike the string momentarily when the key is depressed; The present invention relates to a string striking mechanism including a pressing device that functions to stop and temporarily hold a hammer while it rebounds after being hit once.

Background Art In this type of conventional force transmission device, the connection between the key and the hammer is released before the hammer hits the string, and then the pivoting movement of the hammer is made only by the added kinetic energy. Continues. Also, this connection is released as soon as the key is released, and in any of these cases, all parts contained within the force transmission device are returned to their starting position and ready for the next string strike. Must be done. However, this is time consuming and the string striking cannot be repeated quickly.

U.S. Pat.No. 1,071,801 discloses a stringing mechanism that includes a force transmission device having a repetitive arm-like means for restoring the force transmission connection between the hammer and the key immediately after the hammer rebounds. ing. While this improves repetitive motion, it does not provide sufficient control of individual or repetitive string striking.

DISCLOSURE OF THE INVENTION With respect to known string striking mechanisms, it is common to not allow pianists to take full advantage of the functionality of the instrument,
It is therefore the object of the present invention to provide a stringing mechanism of the type mentioned at the outset, which has even better playing characteristics than those known.

The force transmission device according to the present invention comprises a rod device, which is preferably movably arranged in the swing surface of the hammer,
The rod device is seated below the abutting portion of the key, and a rearwardly extending arm connects a lower rod on which a fixed portion of the musical instrument is pivotally supported and a hammer butt so as to pivot upward. And a first curved boss or roller supported by the first curved guide during the string striking operation on the bending side of the rod device at the time of striking the string. , A second bending boss or roller supported by a second bending guide, and at least one intermediate rod pivotally connected to the other rod, the first bending guide being within the instrument. Movably arranged in the plane of the rod device on a fixed base member,
The base member is provided with locking means for releasably locking the curved guide in a first forward position where the rod device can bring the hammer into contact with the string, and the string striking mechanism locks the key by continuing to press the key. Release means for releasing the means such that the curved guide is first in a second retracted position in which the rod device is unable to contact the hammer with the string.
Of the guide boss or roller, and a device for returning the curved guide to its initial forward position when the pressing force applied to the key is canceled or sufficiently reduced, The objects of the invention are achieved. Therefore, there is no disconnection between the key and the hammer, which results in the pianist having an improved touch or feel of the keyboard and better control of string striking. In addition, string striking can be repeated from almost all hammer and key positions. Therefore, it is possible to exactly follow the pianist's intention and repeat the string striking very quickly. It is possible to play fast and short passages without fatigue, as compared with the case of using a conventional string-striking machine.

In one advantageous embodiment of the string striking mechanism of the present invention, the string striking mechanism comprises a first curved guide pivotably pivoted downwardly on a base member and a spring biased to one side of the first string guide. Of the locking means is pivotally supported on the base member so as to be pivotable upward,
A locking pawl that releasably locks the curved guide in its first position by engaging the upper end of the curved guide, and a lever preferably arranged to be vertically slidable in connection with the base member. And a release means comprising a release arm disposed on the lower rod, the release arm extending below the lever portion and lifting the lever portion during a string striking action, the upper end of the lever portion having a locking pawl. The first guide boss or the roller causes the curved guide to move to the second position as soon as the hammer strikes the string.
It is characterized in that it is pushed into the position.

Furthermore, according to the present invention, in the string striking mechanism in one embodiment which is particularly useful for a piano for the purpose of safely restraining the hammer when the hammer hits the string once, in the stringing mechanism, the pressing device is a stationary pressing part. A movable type of a complementary shape pivotally connected to a hammer butt (that is, the engaging surface of the stationary die holding portion is formed to match the engaging surface of the movable die holding portion when engaged) A pressing device including a pressing portion is provided, and a protrusion protruding upward is provided on the upper side of the lock claw, the protrusion being seated on the lower portion of the movable die pressing part, and the lock claw extends from the first bending guide. The structure is such that the movable die holding portion can be engaged with the stationary die holding portion when it is detached.

Particularly, in another embodiment of the present invention suitable for a grand piano, the pressing device is a stationary pressing part and a movable pressing part having a complementary shape, and the pressing part pivotally connected to the hammer butt. The swivel arm is pivotally supported on the fixed part of the musical instrument, and the swivel arm has an upper part which is seated on the rear side of the movable die holding part and a lower part which is engaged with the contact part of the lower rod. The hammer striking mechanism is configured so that the movable die pressing portion engages with the stationary die pressing portion when the lower rod disengages the lock pawl from the first curved guide via the lever portion. Secure restraint. However, the pivot arm may be arranged on the lower rod and actuated by engaging the abutment of a fixed part of the instrument.

When turning the instrument around the horizontal axis to reduce the volume when striking a string, the damper bar, which is placed so as to move the rest position of the hammer close to the string, is a conventional stringing mechanism for pianos. Is prepared. In order to further increase the register range of such attenuation and to reduce the repercussion of the attenuation means against the resistance of the key,
The string striking mechanism of the present invention comprises at least one substantially vertically arranged damper arm which is pivotable about a bearing arranged on a fixed part of the musical instrument, the damper arm being provided on a downward portion of the damper arm. The second curved guide fixed to the second curved guide is disposed slightly above and spaced from the fixed second curved guide,
The upwardly facing portion of the damper arm engages a control rod associated with the damper bar such that the second curved guide is sufficiently spaced from the first curved guide at any location on the damper bar that the second guide boss or roller is , When the key is in its rest position, it makes little or no contact with the second curved guide.

In a conventional grand piano, the hammer is damped by laterally moving the string striking mechanism so that each hammer strikes only two of the three strings in each string of each set. However, according to the string striking mechanism of the present invention, the damper bar for damping the grand piano is used as follows, and when damping is performed, each hammer strikes all the strings in the strings of the set, and the grand piano However, it is possible to maintain the timbre when it is attenuated. This is a damper bar that moves the rest position of the hammer to approach the string or strings of the string when it is desired to reduce the loudness, and the horizontal axis via the swing arm pivotally supported by the fixed part of the musical instrument. The string striking mechanism of the present invention further comprises a damper bar pivotable about a second bar, the mechanism comprising at least one lever connected to the damper pedal for pivoting the pivot arm, the second bending guide. Has a fixed portion of the musical instrument pivotably supported, the lever engages with the curved guide, and at any position of the damper, the second curved guide is sufficiently separated from the first curved guide, so that A second guide boss or roller provides little or very little contact with the second curved guide when the key is in its rest position.

Furthermore, according to the invention, a spring is fixed between the rear end part of the key and the release arm of the lower rod, which spring has a spring force in one direction which can be adjusted by means of an adjusting screw, It is desirable that the spring force, along with other repulsive forces from the mechanism, be of a magnitude that provides a key depression resistance equal to that found in conventional strings of this type. The resistance force that the pianist needs to overcome when depressing the key can thereby be adjusted to the extent that it would normally be in a conventional stringing mechanism. If this spring is not used, the string striking mechanism of the present invention has less resistance to the key pressing force than the conventional mechanism. This is because the friction of the various parts is low, the mass that has to be moved against gravity is low, and part is absorbed by the first curved guide. As a result, the unidirectionally directed spring force forms an integral part of the overall key resistance, and therefore adjusts that resistance in response to a wide range of pianist personal temperaments and finger strengths. Can be done.

According to the invention, it is further possible to form the curve of the first bending guide such that the hammer striking action takes place at a high speed when the key is depressed at a constant speed. In the conventional string striking mechanism, the key / hammer ratio has a constant angular velocity when the key is depressed uniformly, or
Angular velocities are imparted to the hammer, each of which decreases as the key approaches its bottom position.
The pianist will only know that the string has been struck by hearing the sound of the string struck or feeling that the key touches the bottom. According to the above-described embodiment of the first curved guide, the pianist is subjected to an increasing resistance of the key during striking, which allows the pianist to follow the movement of the hammer in his head and to predict its end point in advance. Is possible. As a result, the pianist can prepare for the next string striking earlier than before, and thus can better control the performance thereof, particularly the performance of the fast passage part. Furthermore, the key pressing distance for each striking is shorter near the bottom of the key pressing than at the key rest position,
Quick iteration is even easier.

In order to effectively repel the hammer and to make the force transmission device play as little as possible, the curve of the second curved guide is further in accordance with the invention, the first guide boss or roller having a first curve during striking motion. It can be the envelope of motion described by the second guide boss or roller when following the curve of one curved guide.

Further, according to the present invention, in a preferred embodiment particularly suitable for a grand piano, the string striking mechanism has a spring or one end connected to a fixed portion of a musical instrument and the other end connected to a hammer or a hammer shank thereof. A similar device may be provided and the spring or similar device may be biased in one direction by a force acting on the hammer or hammer shank in the same direction as the hammer striking action. As a result, the weight of the hammer is transmitted through the entire force transmission mechanism as in the conventional case, and unlike the conventional case where the weight is corrected by the lead balance weight in the key, for example, it is substantially absorbed by the spring. Operates more easily and with less wear.

In a particularly preferred embodiment of the invention, the first and second guide bosses or rollers are integrated as one guide boss or roller. This makes the structure particularly simple, lightweight and effective.

BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawings, FIG. 1 is a partial cross-sectional side view of an embodiment of a string striking mechanism according to the present invention, which is particularly suitable for Viano, in a rest position, and FIG. Fig. 3 is a diagram of the string striking mechanism at an instant, Fig. 3 is a diagram showing the string striking mechanism when restrained, and Fig. 4 is a diagram showing the damper bar in the forward tilt position for moving the hammer to a position close to the string. 1 is a view of the string striking mechanism, FIG. 5 is a partial cross-sectional side view of the second embodiment of the string striking mechanism of the present invention, which is particularly suitable for a grand piano, in a rest position, and FIG. It is a partial cross section side view of the 3rd Example of the string striking mechanism of this invention especially for grand pianos in a rest position.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below with reference to some embodiments with reference to the accompanying drawings.

In FIG. 1, the string striking mechanism is indicated by reference numeral 1 as a whole. This embodiment comprises vertical strings 2 and is particularly suitable for pianos. A hammer 3 connected to a hammer butt 5 via a hammer shank 4 is provided for each string 2 or set of strings, the hammer bat 5 being pivotably mounted in a bearing 6 on a fixed part 7 of the instrument. The fixed part 7 of the musical instrument comprises a bar extending in the longitudinal direction of the entire keyboard. In the lower part of the figure, there is shown a key 8a which tilts about the tilt bearing 9 and acts to strike the string 2 with the hammer 3 by the pressure applied to the front end 8b of the key. It is transmitted to the hammer butt 5 via a force transmission device in the form of a rod device that is movable in the pivot plane of the hammer.

This rod device comprises a lower rod 10 and an intermediate rod 11
And an upper rod 12. The lower rod 10 is seated downwards against an abutment 13 on the rear end 8c of the key and is pivotably suspended from a bearing 14 on a fixed part 7 of the instrument by an arm 15 extending rearwardly. These rods of rod device
The 10, 11, 12 are connected to each other by a link 16 as shown, and the upper rod 12 is connected to the hammer butt 5 by a link 17. In this way, unlike conventional constructions, there is no need for disengagement to allow the hammer to pivot away from the string after the string has been struck once, and there is always a bonded connection. It exists between the part 13 and the hammer 5.

During striking, the rod device is actuated by pressure and if the device is not supported further, the rods 10, 11, 12 of the device are
It is believed that this pressure causes the rod device to bend laterally as a result of the formation of large or small angles with each other. The first guide boss or roller 18 that contacts the first curved guide 19 is disposed on the intermediate rod 11,
Balance the rod device. Similarly, the second curve guide
The second guide boss or roller 20 seated against 21 is
It is located on the opposite side of the intermediate rod 11, which allows
The rod device ensures a balanced state during repulsion, and the rod device includes an adjusting screw 23 provided on the rear end 8c of the key 8a,
As shown in the figure, a tension force is received by a tension spring 22 hung between the lower rod 10 and a release arm 24 protruding leftward. The function of the release arm 24 will be described in more detail below.

FIG. 2 shows the mechanism at the moment of striking the string, that is, when the hammer just reaches the string and vibrates the string. As can be seen, the first guide boss or roller
The 18 moves a certain distance upwards along a first curve 25 conveniently formed on the first curved guide 19 and the hammer contacts the string. When the first bending guide 19 is firmly mounted in the instrument, this state is maintained as long as the key is held down, so that the string cannot freely vibrate.
A similar situation occurs when the key is immediately released, because the hammer cannot leave the string as fast as the string vibrates.

Therefore, the first curved guide 19 pivots about the link 27 and the rod device allows the hammer to contact the string.
Mounted on a fixed base member 26 so that it can pivot between its advanced position and a second retracted position where such contact is not possible.

The locking pawl 28 is located above the base member 26 and is
It is designed so that it can turn up and down around 29.
When in the lower position, the locking pawl engages the upper end of the first curved guide 19, which locks the guide 19 in its first advanced position, so that during rod striking the rod device. It works to control.

A lever portion 30 extends vertically through the base member 26 from under the locking pawl 28 toward the front end of the release arm 24. When the key is pressed, the lower rod 10 pivots, which causes the release arm 24 to pivot upward, resulting in a locking pawl.
The lever 28 is disengaged from the engaged state with the curved guide 19 of FIG. 1 through the lever portion 30. This is done so that it can be done exactly the moment the hammer strikes the string. With this,
The hammer is pulled out of the string at a speed faster than the vibration speed. The reason is that as a result of the pressure acting on the first curved guide 19 from the first guide boss or roller 18, the guide momentarily pivots to its second retracted position, where the geometry of the rod arrangement is Due to the physical form, the hammer cannot reach the string even when the key is pressed completely in its original position. This situation is shown in FIG.

The string striking mechanism further comprises a hold down device 32a which serves to stop and temporarily hold the hammer during rebound. The holding device 32a is composed of a stationary holding portion 32b arranged on the base member 26 and a movable holding portion 32c of a complementary shape pivotally connected to the hammer butt 5 via an arm 33. There is. The upwardly projecting protrusion 34 disposed above the lock pawl 28 pushes up the lower side of the movable die pressing portion 32c, and the lock pawl 28 separates from the first curved guide 19 and at the same time, lifts the holding portion. , The stationary pressing part 32b. This allows the hammer to be restrained and immediately held during the rebound and only hit the string once.

When the pianist reduces or eliminates the pressing force on the key, the pressure in the rod device is correspondingly reduced or removed, so that the compression spring 31 causes the first bending guide.
The 19 can again be forced back into its first forward position. Along with this, the pianist can immediately repeat striking as desired and, as will be appreciated, this is done very close to the bottom of the key, much faster and easier than known methods. It is possible to Also, because the rod device always maintains the connection between the key and the hammer,
The pianist will have a better touch or feel of the keyboard and will have better control over string striking.

When a string is struck, its vibrations are stopped again so that the sound from the next string to be struck is obtained. This is done by means of a damper 35 arranged on the lever arm 36, which normally engages the string 2 by means of a spring 37 acting on the lever arm with a pressure biased in one direction. Maintained in a state. Press the key down and the lower rod
The 10 pivots about its bearing 14 and the damper 35 is lifted by the boss 38 on the arm 15 extending rearward of the lower rod and separated from the string 2. The string 2 is now free to vibrate when struck by a hammer, but when the key returns to its rest position the vibration stops immediately.

In the conventional string striking mechanism, the key pressing resistance is
60-80 grams, which is the force a pianist normally applies to a finger when pressing a key. However, the string striking mechanism of the present invention is lighter in weight than the conventional mechanism, and part of this already light weight is further reduced to the first bending guide.
Absorbed by 19. A tension spring 22 hung between the release arm 24 and the rear end 8c of the key 8a is biased in one direction by spring force to increase the resistance of the key to the usual 60-80 grams. However, the resistance of this key can be adjusted within wide limits by the adjusting screw 23, depending on the intention of the pianist and the force of the finger. The spring force exerted by the tension spring 22 on the rod device 10, 11, 12 further contributes significantly to the realization of the desired quick and safe repulsive movement.

For example, as shown in FIG. 1, the string striking mechanism includes a damper bar 39 extending in the longitudinal direction of the entire keyboard. At the side of the keyboard, the damper bar is pivotally supported in a bearing 40 and is fixed by a fixed stopper bar 41.
It is possible to pivot about the horizontal axis between the rear position shown in FIG. 1 and the front position shown in FIG. A link connection (not shown) between the damper bar and a pedal (not shown) that the pianist can operate with his or her own foot allows pivoting to a desired position.

Since the hammer travels a short distance before striking the string, less energy is imparted to the string, so the damper bar also moves the rest position of the hammer closer to the string when trying to damp its volume. Work.

When the distance between the first curved guide 19 and the second curved guide 21 in its forward position is constant, the key cannot return to its rest position when the pianist releases it. Absent. The reason is that the key normally stays in a position where it must be depressed in order to pivot the hammer to its new rest position corresponding to the desired degree of damping.

Therefore, in the illustrated embodiment, the second bending guide 21, which is a bar extending in the longitudinal direction of the entire key, has a bearing 42 at the side of the keyboard where the bending guide is further rigidly connected to the damper arm 43. It is drooping from which it can turn. Each of these damper arms is provided at the top with a groove 44 into which a pin 45 of a control rod 46 arranged at each end of the damper bar engages.

When the damper bar turns forward as shown in Fig. 4,
The damper bar pivots the damper arm 43 in the opposite direction again by the pin 45 engaging the groove 44 of the damper arm 43. This causes the second curved bar to pivot sufficiently rearward in the direction of arrow A in FIG. 4 so that the key can be fully returned to its rest position.

However, as is apparent from FIG. 4, the distance between the first and second curved guides increases, so that when damped, the first curved guide and its relationship when the key is in its rest position A play occurs between the guide roller and the guide roller.
Along with this, only when this play is eliminated, that is,
The key moves with the hammer while the key is pressed when the key is pushed down to a position corresponding to the new rest position of the hammer.

However, a considerable part of the resistance force of the key in the string striking mechanism of the present invention is caused by the spring 22, and accordingly,
While pressing down the key during damping, unlike the conventional string striking mechanism, it is possible to jump from the first slight movement with a small resistance force to the actual striking motion in which the resistance force rapidly increases to its maximum limit force. There is no advantage to the pianist.

Another advantage provided by the damping mechanism described above is that, unlike conventional string striking mechanisms, it is capable of damping from full volume to full attenuation, ie, zero volume. The reason is that the play in the damping mechanism described above can be so great that at the same time the locking pawl 28 releases the first curved guide 19, the hammer starts its pivoting movement.

The curve 25 of the first curved guide 19 can be of any convenient shape, but this curve is such that when the key is depressed at a constant speed, the hammer striking action is performed at an increased speed. It is particularly advantageous to have a smooth curve. As a result, the pianist will be able to play with a difference in the cloud while feeling a more supple and lively string striking.

Regardless of the shape of the curve 25 of the first curved guide 19,
The curve 47 of the second curved guide 21 is formed as an envelope of the motion described by the second guide boss or roller when the first guide boss or roller follows the curve of the first curved guide during the string striking motion. It is advantageous to do With this,
While the key is pressed down, the action of the string striking mechanism is maximally uniform and there is no play.

FIG. 5 shows a second embodiment of the string striking mechanism according to the present invention. This embodiment, generally designated 101, is formed in substantially the same manner as the structure described above, and
Parts having the same purpose and having the same function are designated by like reference numerals in the 100s. This string striking mechanism 101 is
With the horizontal chord 102, the hammer shank 104 of the hammer 103 is likewise arranged substantially horizontally.

Also in this case, the holding device 132a is the stationary die holding part.
132b and a movable pressing portion 132c having a complementary shape, which is pivotally connected to the hammer butt 105. A swivel arm 48 seated on the rear side of the movable holding portion 132c is arranged on the first musical instrument portion 107 so as to swivel around a bearing 49. The swivel arm 48 is a lower rod
When the locking pawl 128 is disengaged from the first curved guide 119 via the lever portion 130, the forward protrusion 51 for engaging the abutting portion 50 of the rear extension arm 115 of the lower rod 110 is further provided below. There is. This causes the pivot arm 48 to rotate and push the movable die retainer portion 132c into engagement with the stationary die stop portion 132b, so that the hammer 103 is quickly and safely restrained at the correct time.

Unlike conventional string striking mechanisms, the string striking mechanism of the present invention includes a unique damper bar 139 pivotally supported by a bearing 140 on the side of the keyboard. This damper bar fulfills the same function as the damper bar of the above-mentioned embodiment, and acts in the same direction as the damper bar. However, the mechanism for increasing the distance from the second curved guide 121 to the first curved guide 119 while rotating the bar is arranged in a slightly different way. For damping a string or strings of strings, located on each side of the keyboard and connected (not shown)
The damper bar 13 is connected by a lever 52 connected to a pedal (not shown) that can be operated by a pianist by foot through
9 can be lifted to the desired height. Each lever 52 is attached with a guide path 53 having a groove 54 formed therein. A second curved guide 121, consisting of a bar extending in the longitudinal direction of the entire keyboard, is pivotably hung from a bearing 142 on the side of the keyboard and is further engaged by a pin 55 in a groove 54 of the guideway 53. This overall mechanism is such that the second curved guide 121 is spaced from the first curved guide 119 in the same manner as in the previous embodiments for vertical strings, so that when damped the second guide boss or The roller 120 is such that when the key is in its rest position, it does not contact, or touches only slightly, the second curved guide.

For example, in a conventional string striking mechanism for a grand piano, a relatively large weight from a substantially horizontally arranged hammer is transmitted to a lead balance weight attached to a key through the entire force transmission device. The string striking mechanism of the present invention comprises a spring 56 having one end attached to a fixed musical instrument portion 57 and the other end attached to a hammer bat 105. This spring 5
6 is urged in one direction by a force that absorbs all or part of the weight of hammer 103. Therefore, this weight does not load the force transmission mechanism between the key and the hammer, or applies only a small amount of load, with which the string striking mechanism functions more easily, and Little wear.

The other functions of the string striking mechanism 101 correspond to the functions of the string striking mechanism 1 described above, and therefore will not be described in further detail.

FIG. 6 shows a third embodiment of the string striking mechanism according to the present invention. This embodiment, generally designated by the reference numeral 201, corresponds to the previous embodiment, except that the structure of the first and second guide bosses or rollers is different, and therefore the same parts are numbered with 100 added. Is shown.

As shown, in this embodiment, the first and second
The guide roller or boss of the second curved guide 221 follows the first curved guide 219 during the striking operation, and the second curved guide 221 during the return operation.
Are integrated as a single guide roller 58 that runs along. This structure is lighter, cheaper and more reliably functioning than the structure described above. If the distance between the first and second curved guides 219 and 221 is equal to the diameter of the roller 58 and the curved portion 225 of the first curved guide 219 is a cylinder surface having a radius equal to this diameter, then The second curved portion 59 on the curved guide 221 is advantageously reduced to a single point or rather an edge.

Otherwise, as mentioned above, the third embodiment 201 shown in FIG. 6 corresponds to the embodiment 101 shown in FIG. 5, and therefore will not be described in further detail.

The first and second guide bosses or rollers of the first embodiment shown in FIGS. 1 to 4 and the second embodiment shown in FIG. 5 have the same method as in the third embodiment. Therefore, it is advantageous to integrate them into a single roller.

Claims (11)

(57) [Claims] 1. A hammer butt (5) for each string or set of strings (2) having a hammer shank (4) pivotally supported about a horizontal axis and supporting a hammer (3) at its free end. ) And the hammer butt (5) and the corresponding rear end (8c) of the key (8), and when the key is pushed down, the hammer (3) instantaneously holds the string (2). A force transmission device for striking and stopping the hammer (3) in repulsive motion after the hammer strikes the string,
And a holding device (32a) that functions to hold the force transmitting device, and the force transmitting device is a rod device that is movably arranged in the same plane as the pivoting motion of the hammer (3). An arm (15) extending downward and rearward so as to be seated on the abutting portion (13) on the key (8).
A lower rod (10) pivotally supported by a fixed part (7) of the musical instrument by a pivot, an upper rod (12) pivotally connected to a hammer butt (5) at an upper side, and the upper rod (12) A string striking mechanism (1) for a stringed instrument, comprising a lower rod (10) and at least one intermediate rod (11) pivotably connected to the rod device, the first fixing being located in front of the rod device. Base member (2
6) is provided with a first bending guide (19), a biasing means (31) and a locking means (28, 30), and the first bending guide (19) is a turning movement of a hammer (3). The urging means (31) is provided so as to be movable in the same plane as the urging means (31), and urges the first bending guide (19) rearward so that the locking means (28, 3
0) is provided so as to be movable in the same plane as the turning motion of the hammer (3), and engages with the first bending guide (19) to move the first bending guide (19) to the first position. The lower rod (10) is provided with a releasing means (24), and at the time of striking the string, the locking means (28, 30) moves in association with the movement of the releasing means (24). The engagement between the locking means (28, 30) and the first curved guide (19) is released, and the first curved guide (19) becomes movable, and the intermediate rod (11). To the first
A first curved boss or roller (18) is provided so as to face the curved guide (19), and the first curved guide (19) comprises:
The base member so that the rod device can pivot between a first advanced position in which the hammer (3) can contact the string (2) and a second retracted position in which such contact is not possible. The pressing device (32a) mounted on the (26) has a stationary pressing part (32b) arranged on the base member (26).
And a movable holding part (32) having a complementary shape, which is pivotally connected to the hammer butt (5) through the arm (33).
c), and a protrusion (34) disposed above the locking means (28, 30) pushes up the movable die pressing portion (32c), and the locking means (28, 30) causes the first The movable die holding part (32c) is lifted upward at the same time as the movable die holding part (32c) is detached from the curved guide (19).
b) to be engaged with the first curved boss or roller (18) that acts against the biasing force of the biasing means (31) at the initial stage during the repulsion operation. As a result of the pressure acting on the curved guide (19), the first curved guide (19) is momentarily swiveled to the second retracted position, is supported and positioned, and the stationary type of the pressing device (32) is fixed. A second guide boss or roller (20) that comes close to and comes into contact with the second curved guide (21) when the engagement between the holding portion (32b) and the movable die holding portion (32c) is released;
The second guide boss or roller (20) is supported by the second curved guide (21) and is arranged on the opposite side of the intermediate rod (11). When the key is depressed, the first curved boss or roller is provided. The rod device moves while the roller (18) is guided by the first curved guide (19) fixed to the first position, whereby the hammer (3) strikes the string and the release is performed at the time of striking the string. The first curved guide (19) made movable by the means (24) is pushed by the first curved boss or roller (18), and the second curved guide (19) in front of the biasing means (31). When the key is released, the hammer (3) is instantly pulled away from the string by moving the rod device forward to the position of the release device (24) and the releasing means (24) moves to the original position. The locking means (28, 30) is engaged with the first curved guide (19) by Serial first curved guide (1
A string striking mechanism characterized in that it is configured to fix 9) to the first position. 2. A first curved guide (19) is pivotally supported downward on a base member (26) so as to be rotatable, and a first guide boss or roller (18) is supported by a spring (31) biased in one direction. ), The lock means is pivotally supported on the base member (26), and engages with the upper end of the first curved guide (19) to thereby form the first curved guide (19). The lock claw (28) for supporting the lever in the first position and the lever portion (3) which is slidably arranged in the vertical direction in a state of being connected to the base member (26).
0) and the release means comprises a release arm (24) arranged on the lower rod (10), said release arm comprising:
It extends below the lever part (30) and functions to lift the lever part during string striking operation, and the upper end of the lever part (30) turns the lock claw (28) to act as the first bending guide (19). The lock engagement state of the string (2) so that when the hammer (3) hits the string (2) once,
The curved guide (19) of the first guide boss or roller (1)
The string striking mechanism according to claim 1, wherein the string striking mechanism is pushed into the second position by 8). 3. The holding device (32a) comprises a stationary holding part (32b) and a complementary movable holding part (32c) pivotally connected to the hammer butt (5), and has a locking claw. The upper part of (28) has a protrusion (34) which is seated below the movable die holding part (32c) and protrudes upward.
And the upper part of the lock claw (28) is
8) is disengaged from the first curved guide (19), the movable die holding part (32c) is moved to the stationary die holding part (32).
Strike mechanism according to claim 1 or 2, characterized in that it is adapted to engage b). 4. The string striking mechanism according to claim 1, further comprising a swivel arm (48) and an abutting part (50) instead of the protrusion arranged above the locking means. (132a) is composed of a stationary pressing portion (132b) and a complementary movable pressing portion (132c) pivotably connected to the hammer butt (105).
8) is arranged on the fixed part (107) of the musical instrument, the upper part where the revolving arm is seated on the front side of the movable holding part (132c), and the contact part (50) on the lower rod (110). A lower part which engages and a movable holding part (132) when the lower rod (110) disengages the locking pawl (128) from the first curved guide (119) via the lever part (130).
A string striking mechanism characterized in that c) is engaged with a stationary die pressing portion (132b). 5. A damper bar (39) which is arranged so as to be rotatable about a horizontal axis of a musical instrument and which allows a rest position of a hammer (3) to approach a string (2) when it is desired to reduce the volume when striking a string. A string striking mechanism including: a substantially vertical direction that is tiltable around a bearing (42) arranged on the fixed portion (7) of the musical instrument with a slight distance from the second bending guide (21). The second bending guide (21) is fixed to the downward portion of the damper arm (43), and the upward portion of the damper arm (43) is provided on the damper bar (39). When the damper bar (39) pivots rearward, the groove (44) with which the pin (45) of the control rod (46) disposed at the end engages is provided.
By engaging the pin (45) with the groove (44) of the damper arm (43), the damper arm (43) is swung in the opposite direction, and the second bending guide (21) is moved to an arbitrary position of the damper bar (39). Is sufficiently separated from the first bending guide (19) so that the second guide boss or roller (20) does not come into contact with the second bending guide (21) or is very small when the key is in the rest position. The string striking mechanism according to claim 1, 2 or 3, wherein the string striking mechanism is configured so as to be in slight contact. 6. A hammer (10) for reducing the volume.
Swing about the horizontal axis (140) via the swivel arm pivotally supported by the fixed part (57) of the musical instrument by acting to bring the rest position of 3) close to the string (102) or the set of strings (102) With a possible damper bar (139), further comprising at least one lever (52) connected to the damper pedal for pivoting the pivot arm, the damper bar (139) fitted on the free end of the pivot arm by means of the lever (52). The second bending guide (121) is actuated and at the same time positions the second bending guide (121), the second bending guide (121) is pivotally supported by the fixed portion (142) of the musical instrument, and the lever (52) is moved to the second position. The second guide boss or the second guide boss when the key is in the rest position and is sufficiently spaced from the first curved guide (119) at any position of the damper bar (139). Roller (120) contacts second curved guide (121) Without or range first of claims, characterized in that only a very small and do not contact, string striking mechanism according to the second term or the fourth term. 7. A spring (22) is hung between the rear end part (8c) of the key and the release arm (24) of the lower rod (10), said spring being adjustable by means of an adjusting screw (23). And, along with other reaction forces from the string striking mechanism, a unidirectionally biased spring force that is substantially sized to impart the same pressure resistance to the key as found in this type of percussion instrument. The string striking mechanism according to any one of claims 1 to 6 characterized in that. 8. The first striking motion of the hammer is performed at an increased speed when the key is depressed at a constant speed.
The string striking mechanism according to any one of claims 1 to 7, wherein a curve (25) of the curved guide (19) is formed. 9. The curve of the second curved guide (21) is the second guide when the first guide boss or roller (18) follows the curved line (25) of the first curved guide during the string striking operation. The string striking mechanism according to any one of claims 1 to 8, wherein the string striking mechanism is an envelope of a motion drawn by a boss or a roller (20). 10. A spring (56) or similar device connected on the one hand to a fixed part (57) of a musical instrument and on the other hand to a hammer butt (105) or hammer shank (104), said spring (56). Or similar devices hammer (103)
The string striking mechanism according to claim 1, wherein the string striking mechanism is urged by a force that absorbs the weight or a part of the weight. 11. The first and second guide bosses or rollers are integrated into one guide boss or roller (58), as claimed in any one of claims 1 to 10. String striking mechanism.